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# RhodeCode VCSServer provides access to different vcs backends via network.
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# Copyright (C) 2014-2018 RhodeCode GmbH
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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import logging
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from dogpile.cache.backends import memory as memory_backend
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from lru import LRU as LRUDict
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_default_max_size = 1024
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log = logging.getLogger(__name__)
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class LRUMemoryBackend(memory_backend.MemoryBackend):
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pickle_values = False
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def __init__(self, arguments):
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max_size = arguments.pop('max_size', _default_max_size)
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callback = None
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if arguments.pop('log_max_size_reached', None):
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def evicted(key, value):
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log.debug(
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'LRU: evicting key `%s` due to max size %s reach', key, max_size)
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callback = evicted
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arguments['cache_dict'] = LRUDict(max_size, callback=callback)
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super(LRUMemoryBackend, self).__init__(arguments)
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def delete(self, key):
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if self._cache.has_key(key):
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del self._cache[key]
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def delete_multi(self, keys):
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for key in keys:
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if self._cache.has_key(key):
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del self._cache[key]
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